Fringe stabilization is possible even with external vibrations by making reference wave out of measurement wave.
Shared vibrant phase which is mainly piston motion cancel out and the fringes look static.
A pinhole has been used for this purpose in point diffraction interferometry [1]}, [2]}.
They use a sidelobe of focused measurement wave and tilted fringes are inevitable.
Demodulating fringes [3]}, [4]} lowers measurement accuracy and high frequency features cannot be recovered.
An SMF can be used due to the high quality wavefront output and easy embodiment [5]}.
But the difficulty of focusing aberrant measurement wave into the small core of a fiber poses doubt about practical uses.
Increasing coupling efficiency of a laser source into an SMF has been a major research activity in optical communication, and thermally expanding the core(TEC) of a fiber is an example [6]}.
